Drill or coring tool



May 491%. 1.582% r T. M. comm DRILL OR coR'InG TOOL F'ild A ril 25, 1925 2 Sheets-Sheet 1 'i 22\ I F i 7 f mi .1- v

g5 26 76 v 11 J I m 0 6 WITNESSES 6 V 7 M cgwvirggl ATTORNEYS Patented May 4,1926;

' expensive tofmanufacture I -Other j objects and ""advanta certain novel features of the construction,

arrangement andicombination of parts which L severance c To all whom it may cohaem:

'tion .as positionedwhen UNITED-STATES PAT NT] ori ce;

marten m comma, or WICBITA FALLS, rms;

name on come rooL.

l Application and April 23,135.. Serial no.- 25391.

Be it known that I, THP'RMANQM. a" citizen of the: United States, residm 2 "at Wichita Falls, n the any. or will in, v.

acterw 'ch is of simple and durable construction, which is positivea'nd reliable in operation and easy and comparatively inr ide in.

will be hereinafter more fully "describedand' partieularl pointedout in .the appended.

claims, re, erence beingsjhad to the accomng a part of th1s"--' 'formi panying drawin Figurel is a view artly in elevatlon andpartly in vertical sect1on showing the invendrilling the well Figure 2 is a iew in transverse; vertical' section of the embodiment shown in Fig ure 1' but illustrating the first step in the repositioning of the parts to bring about the w of the coreand the retention of the core in the tool, A

Fi re 3 is a view similarto Figure 2 but showing theparts as positioned when the core has been cut'ofi and'the removed section held in the tool. P v

Figure 4 is a view 'ingtransverse section on the line 4-4 of Figure-3; and a.

Figure 5 isa sim1lar view o 5-5 of Fig. 3. M

Referring to the drawings, the'numeral l; clesignatesi'the lower end of the drill steml A tubular drivin member2'has its upper end fastened to t e lower end ofthe dril stem asby means of threads 3.

A tubular cutter head or member 4:. is provided and itsfo'rward end is enlarged, as at 5, and provided with transverse thickness of the lower en n the line slots 6.

The .lower ends of the slots 6 extend out through the bottom ofthe cutter head and are contracted to present shoulders 7. Cutters 8 are'provided and have enlarged por-' trons 9 .fitted'in the slots 6. The cutters 8 have a transverse extent reaterrthan. the of vthe tubular cutter head 4 and the-portions of the cutters 1 8 which project beyond the outside of'the cutter head are-engaged by a holding ring 10 which hasthrea ed engagement with the cutterhead and which may be turned to forcibly press down on the cutters and bind theme met the shoulders 7 whereby, to lock andvho d them in-position.

The; adjacent end of the driving m em ber'2 and the cutter head 4 are formed with interengaging means by which the cutter head may be driven from the drivingvmem ber. 'lhis intereugaging means preferably comprises alternate projections 11 and recesses 1 2 out-he driving member 2 and corresponding pro ections 13 and recesses 14 on the cutter 'head,- the projections 11' being.

received in the. recesses 14 andthe project1ons 13 in the recesses 12 when the cutter headis driven from the driving member.

With this arrangement when the parts are ositioned as shown in- Fi re 1 and. the r ll stemvis rotated; the driving member 2 fastened to the drill stem will also be rotated therewithan d'the rotary movement of the drivin' member will be transmitted to the cutter ead through the recesses and projections 11, 12,13 and 14. When the cutter head'is thus turned and advanced the cutters 8 will be effective to form a hole or bore in'theearth and the will also form a core which will passup t rough the opening of the tubular cutter head.

In order to provide for the severance and retention of this core while the drill stem and' tool are being aised, core severing and retaining means is provided and comprises a tubular carrier 15 fitted .in the driving lower end of the carrier 15 aplurality of corese'vering and retaining fingers-16 are provided. The upper ends of the fingers 16 are secured, as at 17 to the lower endof the sleeve 15 but the major portions of the fingers project below the sleeve; The fingers 16 "ssess some degreeof resiliency but are 'su oiently heavy and rigid to hold the core.

when in the position shown-in Figure 3.

a "member 2 and in the cutter head 4. At the The lower ends of the fingers 16 are curved I inwardly, as ark-1s, and the curved portions 18'are'c'oioperable with a cannning shoulder formed ontheouterheatd 4. When the parts are positioned", as shown in Figures 1 and 2, the fingers 17 do not obstruct the passage 20 of the cutter'head which leads out through the lower end of the cutterq whereas,

as shown. in Figs. 3 and 5 the fingers 16 may be moved to form an effective closure or obstruction for this passage so as to prevent the core fromialling out of the tool.

I It is proposed to control the action of the provided at itsupper endwith lugs-21, four I lugs being provided at angular intervals of threaded, as indicatedat 25, and these threads are engaged-with threads-2'6 pro- 90. The lugs .21 may be positioned in slots 22formed in the driving member. 2 or;

they may 'bepositioncd in an annular clearance space 23 which is formed by mach nin'g out the driving member ad acent one end. The slots 22 extend from theclearin-g space 23 down through the driving'member to a point adjacent to but spaced from the lower, end of: the driving;member. The lowerendWalls of the slots 22 present shoulders 24which may co-act with the lugs 21 to prevent: the tool from; fallingapart.

The lowerendjof the sleeve 15 is externally vided on the insideof the cutter head 24;

vthe core which has been formed by the drilloperation above described, and which haslpas'sedup' through'the 1nter1or 10f the tool through theop'ening '20, the drill-stem israised andthis (mil SGSftlIB-PIOJ BCtlOBS l1 j and recesses l2 zto be moved away from the projections'13'a1 1'd recesses and also causes the slots 22 to be elevated until the lugs 21 are positioned. therein, Nowwhen the drill I stem'is turned the. drivingmember 2w11l,

1 s of coursebe turned but {the cutterhead A:

will tendto-remain stationary dueto the engagement off-the cutter teeth 8 w th the earth and to the, inertia of the. cutter head and its partsfThe-"sleeve 115-"w1ll, however, be turned with the driving member. j 2 since the ,lugs 21 and 'slot's: :22. provide a driving connection ail-this time: When the sleeve 15 is so turned it -"will be advanced down through the cutterhead due ,to the action ofthe threads 25 .an'd 26 and thefinovenient of the sleeve 15 down through the cutter:head will cause the fingers 1 5 to slide down the cam shoulder 1;9and;to be urged inwardly from the position-shown Figures 1 and 2' to 'theposltion shown 111 Figure 3. This movement of the fingers W11]. result in asev'eranc'e of heico're, the outer ends or the fingers being; sharpened -suf-- ficiently to'enable them to perform this severing acti'on. The fingersnot only serve to sever a section core but also to hold the sections so severed. within.- the tool.

I claim: 1.- In a tool of the character described,

a tubular cutter head, a driving; member,

means whereby the cutter head may be actu ated from the driving member or. ClLSCOIb nected therefrom, normally inactiveroreholding means'for positively moving-said core-holding means to core-holding position when the driving member is disconnected from the cutter head and rotated.

2. In a tool of the character described,

a cutter head having cutt rs at its forward I end, a driving membe, interengageable means between the driving member: a'nd-j the tutter head, a carrier fitted" within the drivnormally inactive g member andfivithin the cutter head, core-holdings devices.-

mounted on said'carrier, said outterf'head I having means to project the ='core-holding means bet-weentheidrivingmember and the cutter head, a carrier fitted within the drivingunember and within the "cutter head, core-holding devices mounted on said oarrier', said cutter head having. means t5 .When it isdesired to remove a section of.

and-including a screw threaded connection. between the carrier and the cuttrhead, and s a driving connection between the carrier and the driving member.

4. In 'a tool of the character described,-

a tubular cuttingthead having cutters at its 'forward end, a tubulardrive member, in-

terengageable recesses and projections on the driving member and on the cutter head,

a carrier sleeve fitted Withinthe cutter headand the'driving-member, said carrier sleeve having outwardly projecting lugs at its upper end andv having external screw threads at its lower. end, said driving memjdeviceswhen the carrier'is advanced there}, through, and positive means operablel'from' the driving member for advancingthe-car .ber having a clearance space designed to accommodate the lugs and also having lengthwise slots in which the lugs-may be,"

received to provide-a driving connect-ion be tween the driving member and the sleeve, 7

said cutter head having internal screw threads engaged" with the' external screw threads of'thecarrier sleeve, a plurality of resilient fingers mounted "on a the carrier sleeve and 'tensioned to normally lie-substantially flat up against the inner wall of the cutter head, the cutterhad'having a camming shoulder cooperable with the fingers asa na when the sleeve is advanced to cause the fingers to be projected across the mouth of the cutter head.

' ,5. In a tool of'the character described, a tubular cutting head having cutters at its forward end, a tubular drive member, interengageable recesses and projections on the driving member and on the cutter head, a carrier sleeve fitted within the cutter head and the driving member, said carrier sleeve having outwardly projecting lugs at its upper end and having external screw threads at its lower end, said driving memher having a clearance space designed to accommodate the lugs and also having lengthwise slots in which the lugs maysbe received to provide a driving connection between the driving member and the sleeve, said cutter head' having internal screw threads engaged with the external screw threa-ds'of the carrier-sleeve, a plurality of core-holding and severing devices mounted,

on the carrier and adaptedto be normally inactive,- and means on the cutter head for projecting said devices when the carrier sleeve is advanced through the cutter head.

THURMAN MAX CONREY. 

